Physics – Atomic and Molecular Clusters
Scientific paper
2004-02-12
Physics
Atomic and Molecular Clusters
The more detailed discussion of the obtained results will be published in Fiz. Nizk. Temp. 30 (2004) [Low Temp. Phys. 30 (2004
Scientific paper
An electron diffraction technique is used to study the structure of clusters formed in an isentropically expanding supersonic argon jet. The formation of the hcp phase with increasing cluster size is reliably detected for the first time. Observations are made for mean cluster sizes N in the range from 1x10^3 to 8x10^4 atoms/cluster. An analysis of the shape of the diffraction peaks is carried out. It is found that in the range N <= 2x10^3 atoms/cluster, where the clusters are icosahedral, the profiles of the diffraction peaks are well approximated by a Lorentzian. For fcc clusters with N >= 3x10^3 atoms/cluster a better approximation is the standard Gaussian function. In the case N >= 1x10^4 atoms/cluster one observes peaks of the hcp phase in addition to the fcc peaks. The intensity of the hcp peaks increases with increasing cluster size, and for N = 8x10^4 atoms/cluster, the (110), (101), (103), and (202) peaks, characteristic only for the hcp phase, are clearly registered in addition to the fcc peaks. A possible mechanism for the formation of the hcp structure in Ar clusters is proposed.
Danylchenko Oleksandr G.
Kovalenko Spartak I.
Samovarov Vladimir N.
No associations
LandOfFree
Electron diffraction data on structural transformations in free clucters of argon does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Electron diffraction data on structural transformations in free clucters of argon, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron diffraction data on structural transformations in free clucters of argon will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-452444